Numerous High-Grade Assays Extend Tolmer Silver Discovery
Multiple new >2,000g-m Ag assays; metallurgical testwork to begin
ADELAIDE, AU / ACCESS Newswire / August 17, 2026 / HIGHLIGHTS
Recent 3,677m drilling program targeted infill and extension of high-grade Tolmer silver discovery, after preliminary testwork yielded a high-grade concentrate grading over 100,000 g/t Ag (10% silver)1
New high-grade assays infill Tolmer's 'western silver zone' and extend its strike to over 500m, while also adding broad, high-grade intersections to the 'eastern gold zone'. These include:
Hole ID | Interval | Including: |
TBM0258 | 10m @ 399 g/t Ag & 0.55 g/t Au from 56m | 4m @ 954 g/t Ag & 1.23 g/t Au from 56m |
TBM0259 | 16m @ 120 g/t Ag from 5m, and 16m @ 493 g/t Ag & 0.66 g/t Au from 50m | 5m @ 282 g/t Ag from 5m 3m @ 1706 g/t Ag from 50m & 2m @ 2.20 g/t Au from 59m |
TBM0260 | 12m @ 194 g/t Ag from 14m, and 13m @ 364 g/t Ag & 0.74 g/t Au from 44m | 2m @ 788 g/t Ag from 18m 1m @ 1,570 g/t Ag & 4.45 g/t Au from 44m |
TBM0272 | 14m @ 104 g/t Ag & 0.49 g/t Au from 77m 14m @ 247 g/t Ag & 1.36 g/t Au from 100m | 1m @ 478 g/t Ag & 1.97 g/t Au from 84m 5m @ 576 g/t Ag & 3.11 g/t Au from 100m |
TBM0289 | 16m @ 3.74 g/t Au & 15.1 g/t Ag from 57m | 1m @ 28.9 g/t Au & 61.0 g/t Ag from 58m |
TBM0290 | 8m @ 9.34 g/t Au & 13.6 g/t Ag from 90m | 2m @ 28.9 g/t Au & 33.5 g/t Ag from 93m |
Barton Gold Holdings Limited (ASX:BGD)(OTC PINK:BGDFF)(FRA:BGD3) (Barton or Company) is pleased to announce further shallow, broad and high-grade assays at its South Australian Tolmer Silver discovery (Tolmer). Tolmer is located at its Tarcoola Gold Project (Tarcoola), where during 2025 Barton announced one of Australia's highest-grade modern silver discoveries with an intersection of 6m @ 4,747 g/t Ag from only 46m depth.1
These assays have further infilled Tolmer's shallow, high-grade 'western silver zone' mineralisation and extended it to over 500m strike, also yielding broad high-grade intersections in the 'eastern gold zone'. Preliminary analyses for petrology and structural interpretation are now underway. Barton will also expedite full metallurgical analysis of Tolmer mineralisation by preparing composite samples taken from recent drilling.
Commenting on the latest Tolmer drilling results, Barton MD Alexander Scanlon said:
"Our South Australian Tolmer silver discovery continues to yield broad, high-grade silver assays across an expanding footprint. With a shallow profile and having produced trial concentrates grading over 100,000 g/t Ag, Tolmer is already hinting at real potential for a low-cost, high-margin operation. We will share our further analysis in due course.
"We are also planning to update our 3.1 million ounce Tunkillia silver Resource, where 58,000m drilling was recently completed to support JORC upgrades, a Pre-Feasibility study, a Mining Lease application and financing discussions.
"Barton's Tolmer and Tunkillia silver assets are emerging as potentially significant contributors to our South Australian precious metals strategy, whether developed as a complement to our regional gold holdings or on a standalone basis."
New assays extend Tolmer silver discovery
During March 2025, Barton announced one of Australia's highest-grade modern silver discoveries at Tolmer, where two shallow horizons (<50m) host peak silver and gold grades up to 17,600 g/t Ag and 51.2 g/t Au and a ‘western silver zone' sample produced a trial concentrate grading >100,000 g/t Ag (~10% silver).2
New assays from 3,677m reverse circulation (RC) drilling have further infilled the high-grade 'western silver zone' and extended its footprint of shallow silver mineralisation to over 500m total strike length.3 These have also infilled the ‘eastern gold zone' with broad, shallow high-grade gold intersections.
Fig. 1 - Tolmer map with Pb background, Ag contours (white), prior (black) & May-June 2026 drilling (red)3
Key new significant assays received include (note: holes TBM0289 - TBM0291 are located in the 'eastern gold zone'):
Hole ID | Interval | Including: |
TBM0258 | 10m @ 399 g/t Ag & 0.55 g/t Au from 56m | 4m @ 954 g/t Ag & 1.23 g/t Au from 56m |
TBM0259 | 16m @ 120 g/t Ag from 5m, and 16m @ 493 g/t Ag & 0.66 g/t Au from 50m | 5m @ 282 g/t Ag from 5m 3m @ 1706 g/t Ag from 50m & 2m @ 2.20 g/t Au from 59m |
TBM0260 | 12m @ 194 g/t Ag from 14m, and 13m @ 364 g/t Ag & 0.74 g/t Au from 44m | 2m @ 788 g/t Ag from 18m 1m @ 1,570 g/t Ag & 4.45 g/t Au from 44m |
TBM0272 | 26m @ 55 g/t Ag from 8m, 14m @ 104 g/t Ag & 0.49 g/t Au from 77m, and 14m @ 247 g/t Ag & 1.36 g/t Au from 100m | 1m @ 478 g/t Ag & 1.97 g/t Au from 84m 5m @ 576 g/t Ag & 3.11 g/t Au from 100m |
TBM0273 | 14m @ 81 g/t Ag from 12m, and 1m @ 1,100 g/t Ag & 1.93 g/t Au from 96m | 1m @ 467 g/t Ag from 20m |
TBM0281 | 2m @ 364 g/t Ag & 3.11 g/t Au from 47m, and 3m @ 217 g/t Ag & 1.00 g/t Au from 55m | 1m @ 622 g/t Ag & 5.80 g/t Au from 47m 1m @ 490 g/t Ag & 2.64 g/t Au from 56m |
TBM0287 | 4m @ 313 g/t Ag & 0.16 g/t Au from 58m | 1m @ 984 g/t Ag & 0.43 g/t Au from 59m |
TBM0289 | 16m @ 3.74 g/t Au & 15.1 g/t Ag from 57m, and 9m @ 2.15 g/t Au & 6.20 g/t Ag from 76m | 1m @ 28.9 g/t Au & 61 g/t Ag from 58m 1m @ 8.20 g/t Au & 37 g/t Ag from 79m |
TBM0290 | 8m @ 9.34 g/t Au & 13.6 g/t Ag from 90m | 2m @ 28.9 g/t Au & 33.5 g/t Ag from 93m |
TBM0291 | 5m @ 3.65 g/t Au & 11.4 g/t Ag from 103m | 1m @ 10.6 g/t Au & 31.6 g/t Ag from 106m |
Table 1 - New key 'western silver zone' and 'eastern gold zone' assays from May-Jun 2026 drilling
Shallow neighbouring silver- and gold-dominant zones
The 'western silver zone' hosts an ‘upper horizon' of broad, shallow silver mineralisation largely independent of gold, and a second ‘lower horizon' at the boundary of oxide and fresh zones hosting silver and gold in broad intervals with grades up to 17,600 g/t Ag and 51.2 g/t Au.4 Mineralised structures extend into fresh rock below. Figure 2 highlights new >4,000g-m assays near discovery hole TBAC0130 (6m @ 4,747 g/t Ag from 46m).4
Figure 2 - Tolmer 'silver zone' cross-section A with anomalous Ag-Pb & key intersections
The 'eastern gold zone' hosts gold as the dominant form of mineralisation. Broad, high-grade mineralisation has been intersected to over 200m depth including 4m @ 24.6 g/t Au & 82.8 g/t Ag from 95m (TBM0161) and 16m @ 3.74 g/t Au & 15.1 g/t Ag from 57m (TBM0289) and 8m @ 9.34 g/t Au & 13.6 g/t Ag from 90m (TBM0290).4
Figure 3 - Tolmer 'gold zone' cross-section B with anomalous Ag-Pb & key intersections
Emerging high-grade 'western silver' and 'eastern gold' footprints
Tolmer's 'western silver zone' is now host to numerous drilling assays exceeding 2,000 gram-metres (g-m) Ag, with key assays from this area also carrying material gold credits. These include:5
Hole ID | Interval | Including: | ||
TBAC0130 | Silver Gold | 6m @ 4,747 g/t Ag from 46 metres 4m @ 13.2 g/t Au from 48 metres | Silver Gold | 1m @ 17,600 g/t Ag from 46 metres 1m @ 51.2 g/t Au from 48 metres |
TBM0227 | Silver | 4m @ 1,417 g/t Ag from 9 metres | Silver | 1m @ 3,790 g/t Ag from 9 metres |
TBM0228 | Silver Gold | 14m @ 434 g/t Ag from 46 metres 3m @ 3.25 g/t Au from 54 metres | Silver Gold | 1m @ 3,530 g/t Ag from 54 metres 1m @ 7.50 g/t Au from 54 metres |
TBM0233 | Silver Gold | 3m @ 993 g/t Ag from 55 metres 1m @ 6.86 g/t Au from 55 metres | Silver | 2m @ 1,475 g/t Ag from 55 metres |
TBM0237 | Silver Gold | 9m @ 217 g/t Ag from 44 metres 1m @ 7.9 g/t Au from 44 metres | Silver | 1m @ 1,100 g/t Ag from 44 metres |
TBM0238 | Silver Gold | 7m @ 648 g/t Ag from 46 metres 5m @ 3.06 g/t Au from 46 metres | Silver Gold | 2m @ 1,720 g/t Ag from 46 metres 1m @ 10.7 g/t Au from 46 metres |
TBM0245 | Silver Gold | 13m @ 142 g/t Ag from 10 metres 5m @ 3.32 g/t Au from 10 metres | Silver Gold | 2m @ 499 g/t Ag from 11 metres 1m @ 13.2 g/t Au from 11 metres |
TBM0246 | Silver Gold | 13m @ 285 g/t Ag from 48 metres 11m @ 3.31 g/t Au from 48 metres | Silver Gold | 1m @ 2,240 g/t Ag from 53 metres 1m @ 22.8 g/t Au from 53 metres |
TBM0254 | Silver Gold | 1m @ 748 g/t Ag from 59 metres 1m @ 3.14 g/t Au from 59 metres | ||
TBM0258 | 10m @ 399 g/t Ag & 0.55 g/t Au from 56m | 4m @ 954 g/t Ag & 1.23 g/t Au from 56m | ||
TBM0259 | 16m @ 120 g/t Ag from 5m, and 16m @ 493 g/t Ag & 0.66 g/t Au from 50m | 5m @ 282 g/t Ag from 5m 3m @ 1706 g/t Ag from 50m & 2m 2.20 g/t Au from 59m | ||
TBM0260 | 12m @ 194 g/t Ag from 14m, and 13m @ 364 g/t Ag & 0.74 g/t Au from 44m | 2m @ 788 g/t Ag from 18m 1m @ 1,570 g/t Ag & 4.45 g/t Au from 44m | ||
TBM0272 | 14m @ 104 g/t Ag & 0.49 g/t Au from 77m 14m @ 247 g/t Ag & 1.36 g/t Au from 100m | 1m @ 478 g/t Ag & 1.97 g/t Au from 84m 5m @ 576 g/t Ag & 3.11 g/t Au from 100m | ||
TBM0273 | 14m @ 81 g/t Ag from 12m, and 1m @ 1,100 g/t Ag & 1.93 g/t Au from 96m | 1m @ 467 g/t Ag from 20m | ||
TBM0281 | 2m @ 364 g/t Ag & 3.11 g/t Au from 47m, and 3m @ 217 g/t Ag & 1.00 g/t Au from 55m | 1m @ 622 g/t Ag & 5.80 g/t Au from 47m 1m @ 490 g/t Ag & 2.64 g/t Au from 56m | ||
TBM0287 | 4m @ 313 g/t Ag & 0.16 g/t Au from 58m | 1m @ 984 g/t Ag & 0.43 g/t Au from 59m | ||
Table 2 - Key 'western silver zone' assays (Nov 2024, Jan-Feb / May-Jun 2025 and May-Jun 2026 drilling)5
Key assays from Tolmer's 'eastern gold zone' now include multiple broad, shallow high-grade gold assays:5
Hole ID | Interval | Including: |
TBM0148 | 9m @ 3.92 g/t Au from 202m | 2m @ 7.15 g/t Au from 202m |
TBM0161 | 4m @ 24.6 g/t Au & 82.8 g/t Ag from 95m | 1m @ 83.6 g/t Au & 312 g/t Ag from 97m |
TBM0222 | 5m @ 4.38 g/t Au from 49m | 1m @ 13.6 g/t Au from 52m |
TBM0225 | 5m @ 3.07 g/t Au from 16m | |
TBM0289 | 16m @ 3.74 g/t Au & 15.1 g/t Ag from 57m, and 9m @ 2.15 g/t Au & 6.20 g/t Ag from 76m | 1m @ 28.9 g/t Au & 61 g/t Ag from 58m 1m @ 8.20 g/t Au & 37 g/t Ag from 79m |
TBM0290 | 8m @ 9.34 g/t Au & 13.6 g/t Ag from 90m | 2m @ 28.9 g/t Au & 33.5 g/t Ag from 93m |
TBM0291 | 5m @ 3.65 g/t Au & 11.4 g/t Ag from 103m | 1m @ 10.6 g/t Au & 31.6 g/t Ag from 106m |
Table 3 - Key 'eastern gold zone' assays (Nov 2024, Jan-Feb / May-Jun 2025 and May-Jun 2026 drilling)5
Next steps for Tolmer
Barton will now focus on structural interpretation and metallurgical analysis for Tolmer.
Analysis of the petrology of Tolmer's silver mineralisation is already underway to inform early perspectives on potential recoverability, with full metallurgical testwork to start using samples composited from current drilling.
Barton will also prepare an updated geological interpretation to inform modelling of the mineralisation, its key controls, the optimal design of follow up drilling programs, and early views of potential mining methods.
The Company will provide further updates on these programs and analyses in due course.
Authorised by the Board of Directors of Barton Gold Holdings Limited.
For further information, please contact:
Alexander Scanlon | Jade Cook |
1 Refer to ASX announcement dated 27 March 2025
2 Refer to ASX announcements dated 27 Aug 2024, and 30 Jan, 27 Mar, 16 Apr, 5 / 25 Aug, 24 Sep and 9 Dec 2025, and 5 May 2026
3 Refer to ASX announcements dated 19 May and 11 June 2026; refer to JORC tables in annexures for full details of all significant intersections
4 Refer to ASX announcements dated 27 Aug 2024, and 30 Jan, 27 Mar, 16 Apr, 5 Aug and 9 Dec 2025, and the results in this announcement
5 Refer to ASX announcements dated 27 Aug 2024, and 30 Jan, 27 Mar, 16 Apr, 5 Aug and 9 Dec 2025, and the results in this announcement
Competent Persons Statement
The information in this announcement that relates to Exploration Results for the Tarcoola Gold Project (including drilling, sampling, geophysical surveys and geological interpretation) is based upon, and fairly represents, information and supporting documentation compiled by Mr Marc Twining BSc (Hons). Mr Twining is an employee of Barton Gold Holdings Ltd and is a Member of the Australasian Institute of Mining and Metallurgy Geoscientists (AusIMM Member 112811) and has sufficient experience with the style of mineralisation, the deposit type under consideration and to the activity being undertaken, to qualify as a Competent Person as defined in the 2012 Edition of the "Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves" (The JORC Code). Mr Twining consents to the inclusion in this announcement of the matters based upon this information in the form and context in which it appears.
About Barton Gold
Barton Gold is an ASX, OTC and Frankfurt Stock Exchange listed Australian gold developer targeting future gold production of 150,000ozpa with 2.2Moz Au & 3.1Moz Ag JORC Mineral Resources (79.9Mt @ 0.87g/t Au), brownfield mines, and 100% ownership of the region's only gold mill in the renowned Gawler Craton of South Australia.*
Challenger Gold Project
Tarcoola Gold Project
Tunkillia Gold Project
Wudinna Gold Project
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Competent Persons Statement & Previously Reported Information
The information in this announcement that relates to the historic Exploration Results and Mineral Resources as listed in the table below is based on, and fairly represents, information and supporting documentation prepared by the Competent Person whose name appears in the same row, who is an employee of or independent consultant to the Company and is a Member or Fellow of the Australasian Institute of Mining and Metallurgy (AusIMM), Australian Institute of Geoscientists (AIG) or a Recognised Professional Organisation (RPO). Each person named in the table below has sufficient experience which is relevant to the style of mineralisation and types of deposits under consideration and to the activity which he has undertaken to qualify as a Competent Person as defined in the JORC Code 2012 (JORC).
Activity | Competent Person | Membership | Status |
Tarcoola Mineral Resource (Stockpiles) | Dr Andrew Fowler (Consultant) | AusIMM | Member |
Tarcoola Mineral Resource (Perseverance Mine) | Mr Ian Taylor (Consultant) | AusIMM | Fellow |
Tarcoola Exploration Results (until 15 Nov 2021) | Mr Colin Skidmore (Consultant) | AIG | Member |
Tarcoola Exploration Results (after 15 Nov 2021) | Mr Marc Twining (Employee) | AusIMM | Member |
Tunkillia Exploration Results (until 15 Nov 2021) | Mr Colin Skidmore (Consultant) | AIG | Member |
Tunkillia Exploration Results (after 15 Nov 2021) | Mr Marc Twining (Employee) | AusIMM | Member |
Tunkillia Mineral Resource | Mr Ian Taylor (Consultant) | AusIMM | Fellow |
Challenger Mineral Resource (above 215mRL) | Mr Ian Taylor (Consultant) | AusIMM | Fellow |
Challenger Mineral Resource (below 90mRL) | Mr Dale Sims | AusIMM / AIG | Fellow / Member |
Wudinna Mineral Resource (Clarke Deposit) | Ms Justine Tracey | AusIMM | Member |
Wudinna Mineral Resource (all other Deposits) | Mrs Christine Standing | AusIMM / AIG | Member / Member |
The information relating to historic Exploration Results and Mineral Resources in this announcement is extracted from the Company's Prospectus dated 14 May 2021 or as otherwise noted, available from the Company's website at www.bartongold.com.au or on the ASX website www.asx.com.au. The Company confirms that it is not aware of any new information or data that materially affects the Exploration Results and Mineral Resource information included in previous announcements and, in the case of estimates of Mineral Resources, that all material assumptions and technical parameters underpinning the estimates, and any production targets and forecast financial information derived from the production targets, continue to apply and have not materially changed. In accordance with ASX Listing Rule 5.19.2, the Company further confirms that the material assumptions underpinning any production targets and the forecast financial information derived therefrom continue to apply and have not materially changed. The Company confirms that the form and context in which the applicable Competent Persons' findings are presented have not been materially modified from the previous announcements.
Cautionary Statement Regarding Forward-Looking Information
This document may contain forward-looking statements. Forward-looking statements are often, but not always, identified by the use of words such as "seek", "anticipate", "believe", "plan", "expect", "target" and "intend" and statements than an event or result "may", "will", "should", "would", "could", or "might" occur or be achieved and other similar expressions. Forward-looking information is subject to business, legal and economic risks and uncertainties and other factors that could cause actual results to differ materially from those contained in forward-looking statements. Such factors include, among other things, risks relating to property interests, the global economic climate, commodity prices, sovereign and legal risks, and environmental risks. Forward-looking statements are based upon estimates and opinions at the date the statements are made. Barton undertakes no obligation to update these forward-looking statements for events or circumstances that occur subsequent to such dates or to update or keep current any of the information contained herein. Any estimates or projections as to events that may occur in the future (including projections of revenue, expense, net income and performance) are based upon the best judgment of Barton from information available as of the date of this document. There is no guarantee that any of these estimates or projections will be achieved. Actual results will vary from the projections and such variations may be material. Nothing contained herein is, or shall be relied upon as, a promise or representation as to the past or future. Any reliance placed by the reader on this document, or on any forward-looking statement contained in or referred to in this document will be solely at the reader's own risk, and readers are cautioned not to place undue reliance on forward-looking statements due to the inherent uncertainty thereof.
* Refer to Barton Prospectus dated 14 May 2021 and ASX announcement dated 8 September 2025. Total Barton JORC (2012) Mineral Resources include 1,049koz Au (39.7Mt @ 0.82 g/t Au) in Indicated category and 1,186koz Au (40.2Mt @ 0.92 g/t Au) in Inferred category, and 3,070koz Ag (34.5Mt @ 2.80 g/t Ag) in Inferred category as a subset of Tunkillia gold JORC (2012) Mineral Resources.
JORC Table 1 - Tarcoola Gold Project
Section 1 Sampling Techniques and Data
Criteria | Commentary |
|---|---|
Sampling techniques Nature and quality of sampling (e.g. cut channels, random chips, or specific specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc.). These examples should not be taken as limiting the broad meaning of sampling. Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used. Aspects of the determination of mineralisation that are Material to the Public Report. In cases where ‘industry standard' work has been done this would be relatively simple (e.g. "RC drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for fire assay"). In other cases, more explanation may be required, such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation types (e.g. submarine nodules) may warrant disclosure of detailed information | Sampling for Barton Gold's drilling program reported in this release was derived from RC drilling. Samples were collected via a cyclone mounted cone splitter to derive both 1m samples with a nominal 2-4kg weight and 3m composite samples with a nominal 4-5kg weight |